PDF(Pubmed)
Abstract：
Introduction: Soil salinity poses a severe threat to rice production, resulting in stunted growth, leaf damage, and substantial yield losses. This study focuses on developing an early maturing seedling stage salinity tolerant rice variety by integrating conventional breeding methods with marker assisted breeding (MAB) approaches. Methods: Seedling-stage salinity tolerance Quantitative Trait Locus (QTL) \"Saltol\" from the salt-tolerant parent FL478 was introduced into the high-yielding but salt-sensitive rice variety ADT 45. This was achieved through a combination of conventional breeding and MAB. The breeding process involved rigorous selection, screening, and physiological parameter assessments. Results: KKL(R) 3 (KR 15066) identified as the top performing Recombinant Inbred Line (RIL), consistently demonstrating maximum mean grain yields under both salinity (3435.6 kg/ha) and normal (6421.8 kg/ha) conditions. In comparison to the early maturing, salt-tolerant national check variety CSR 10, KKL(R) 3 exhibited a substantial yield increase over 50%. Discussion: The notable improvement observed in KKL(R) 3 positions it as a promising variety for release, offering a reliable solution to maximize yields, ensure food security, and promote agricultural sustainability in both saline and non-saline environments. The study highlights the effectiveness of MAB in developing salt-tolerant rice varieties and emphasizes the significance of the Saltol QTL in enhancing seedling stage salinity tolerance. The potential release of KKL(R) 3 has the capacity to revolutionize rice production in salt affected regions, providing farmers with a reliable solution to maximize yields and contribute to food security while ensuring agricultural sustainability.
摘要：
简介:土壤盐分对水稻生产构成严重威胁,导致生长迟缓，叶片损伤,和大量的产量损失。本研究的重点是通过将常规育种方法与标记辅助育种（MAB）方法相结合，开发早熟苗期耐盐水稻品种。方法：将耐盐亲本FL478的苗期耐盐性定量性状基因座（QTL）“Saltol”引入高产但对盐敏感的水稻品种ADT45。这是通过常规育种和MAB的组合来实现的。育种过程涉及严格的选择，筛选,和生理参数评估。结果：KKL（R）3（KR15066）被确定为表现最好的重组自交系（RIL），在盐度（3435.6kg/ha）和正常（6421.8kg/ha）条件下，始终显示出最大的平均谷物产量。与早熟相比，耐盐国家检查品种CSR10，KKL（R）3的产量显着提高了50％以上。讨论：在KKL（R）3中观察到的显着改善使其成为有希望的释放品种，提供可靠的解决方案以最大化产量，确保粮食安全,并在盐水和非盐水环境中促进农业可持续性。该研究强调了MAB在开发耐盐水稻品种中的有效性，并强调了SaltolQTL在增强苗期耐盐性方面的重要性。KKL（R）3的潜在释放具有在受盐影响的地区彻底改变水稻生产的能力，为农民提供可靠的解决方案，以最大限度地提高产量，并在确保农业可持续性的同时促进粮食安全。
